دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

abbr: Society of Petroleum Engineers.

Society of Petroleum Engineers.

n : a fishing tool used to retrieve pipe lost in a well. The spear is lowered down the hole and into the lost pipe. When weight, torque, or both are applied to the string to which the spear is attached, the slips in the spear expand and tighdy grip the inside of the wall of the lost pipe. Then the string,spear, and lost pipe are pulled to the SPEARS surface.

n: An inside catch tool which goes inside a tubular fish and catches it with a slip.

a fishing tool that is designed to enter an opening of a fish and grip the ID.

n: a rope socket with a point on it that mates with a spearhead overshot.

n: see prejlush.

n: A section of special liquid be bumped-in before bumping-in spacer fluid
when cementing ,which used to clear out cake of borehole wall .

n: the small wirelineoperated overshot designed to latch onto a spear point rope socket so that the wireline below the socket can be retrieved.

n: First cone nose of cone bit .

n: the amount of heat required to cause a unit increase in temperature in a unit mass of a substance, expressed as numerically equal to the number of calories needed to raise the temperature of I gram of a substance by 1�C.

n: A important hydraulic power parameter of bit .

n: see relative density.

the ratio of the density of a substance to the density of a comparison material, usually at a specific temperature and pressure.